Question

Mark’s older brother does lawn care. He charges $22 to mow a lawn up to 500 square feet. For lawns more than 500 square feet, he charges an additional $5 for each 100 additional square feet. How much will it cost to have Mark’s brother mow a lawn that is 20 feet long and 25 feet wide? What is the cost for a lawn that is 30 feet long and 30 feet wide?

Answer 1

wooo - some threat.
20*25 = 500, so $22
30*30 = 900, so 22 + 5*(900-500)/100 = 22 + 5*4 = $____